keyword
MENU ▼
Read by QxMD icon Read
search

Volatile

keyword
https://www.readbyqxmd.com/read/28531323/effect-of-chemical-ratios-of-a-microbial-based-feeding-attractant-on-trap-catch-of-drosophila-suzukii-diptera-drosophilidae
#1
Dong H Cha, Peter J Landolt, Todd B Adams
Drosophila suzukii Matsumura, spotted wing drosophila, can be trapped with a feeding attractant based on wine and vinegar volatiles and consisting of acetic acid, ethanol, acetoin, and methionol. Using that four-component blend, we found that the catch of spotted wing drosophila increased with increases in the release rate of acetoin (from 0.5 mg/d to 34 mg/d) from polyethylene sachet dispensers, and with increases in the concentrations of acetic acid (from 0.25% to 4%) or ethanol (from 0.08% to 2%) when dispensed in the trap drowning solution...
May 22, 2017: Environmental Entomology
https://www.readbyqxmd.com/read/28530582/proton-transfer-reaction-mass-spectrometry-ptr-ms-for-the-authentication-of-regionally-unique-south-african-lamb
#2
Sara W Erasmus, Magdalena Muller, Martin Alewijn, Alex H Koot, Saskia M van Ruth, Louwrens C Hoffman
The volatile fingerprints of South African lamb meat and fat were measured by proton-transfer mass spectrometry (PTR-MS) to evaluate it as an authentication tool. Meat and fat of the Longissimus lumborum (LL) of lambs from six different regions were assessed. Analysis showed that the volatile fingerprints were affected by the origin of the meat. The classification of the origin of the lamb was achieved by examining the calculated and recorded fingerprints in combination with chemometrics. Four different partial least squares discriminant analysis (PLS-DA) models were fitted to the data to classify lamb meat and fat samples into "region of origin" (six different regions) and "origin" (Karoo vs...
October 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28530570/enhanced-antimicrobial-activity-of-essential-oil-components-immobilized-on-silica-particles
#3
María Ruiz-Rico, Édgar Pérez-Esteve, Andrea Bernardos, Félix Sancenón, Ramón Martínez-Máñez, María D Marcos, José M Barat
The antimicrobial activity of essential oils components (EOCs) is well-known. However, their high volatility and powerful aroma limit their application in the formulation of a wide range of food products. In this context, the antimicrobial activity of carvacrol, eugenol, thymol and vanillin grafted onto the surface of three silica supports with different morphologies, textural properties and chemical reactivities (fumed silica, amorphous silica and MCM-41) was evaluated herein. Materials characterization revealed a good immobilization yield and all the devices showed a micro-scale particle size...
October 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28530563/effect-of-gallic-and-protocatechuic-acids-on-the-metabolism-of-ethyl-carbamate-in-chinese-yellow-rice-wine-brewing
#4
Wanyi Zhou, Ruosi Fang, Qihe Chen
It was studied that gallic and protocatechuic acids played important roles in ethyl carbamate (EC) forming. Gallic and protocatechuic acids can reduce the arginine consumption through inhibiting the arginine deiminase enzyme. Therefore, they are generally added to regulate EC catabolism in the course of yellow rice wine leavening at the third day. In this work, gallic and protocatechuic acids made little influence on the growth of Saccharomyces cerevisiae. Besides, the addition of 200mg/L gallic or protocatechuic acid could prevent the transformation from urea/citrulline to EC...
October 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28530097/total-particle-number-emissions-from-modern-diesel-natural-gas-and-hybrid-heavy-duty-vehicles-during-on-road-operation
#5
Tianyang Wang, David Christopher Quiros, Arvind Thiruvengadam, Saroj Pradhan, Shaohua Hu, Tao Huai, Eon S Lee, Yifang Zhu
Particle emissions from heavy-duty vehicles (HDVs) have significant environmental and public health impacts. This study measured total particle number emission factors (PNEFs) from six newly-certified HDVs powered by diesel and compressed natural gas totaling over 6,800 miles of on-road operation in California. Distance-, fuel- and work-based PNEFs were calculated for each vehicle. Distance-based PNEFs of vehicles equipped with original equipment manufacturer (OEM) diesel particulate filters (DPFs) in this study have decreased by 355-3200 times compared to a previous retrofit DPF dynamometer study...
May 22, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28529841/rapid-and-conformal-coating-of-polymer-resins-by-airbrushing-for-continuous-and-high-speed-roll-to-roll-nanopatterning-parametric-quality-controls-and-extended-applications
#6
Jae Hyuk Lee, Minho Na, Jiyeop Kim, Kangeun Yoo, Jaekyu Park, Jeong Dae Kim, Dong Kyo Oh, Seungjo Lee, Hongseok Youn, Moon Kyu Kwak, Jong G Ok
We present a facile and scalable coating method based on controlled airbrushing, which is suitable for conformal resin coating in continuous roll-to-roll (R2R) nanoimprint lithography (NIL) process. By controlling the concentration of UV-curable polymeric resin with mixing the volatile solvent and its airbrushing time, the coated resin film thickness can be readily tuned. After R2R NIL using a flexible nanoscale line pattern (nanograting) mold is conducted upon the airbrushed resin film, a large-area uniform nanograting pattern is fabricated with controlled residual layer thickness (RLT) based on the initial film thickness...
2017: Nano Convergence
https://www.readbyqxmd.com/read/28528539/volatile-agents-in-critical-care-sedation-yes-no-or-maybe
#7
Valerie Page, Mike Carraretto
No abstract text is available yet for this article.
May 19, 2017: Minerva Anestesiologica
https://www.readbyqxmd.com/read/28528107/foliar-nitrogen-application-in-cabernet-sauvignon-vines-effects-on-wine-flavonoid-and-amino-acid-content
#8
Gastón Gutiérrez-Gamboa, Teresa Garde-Cerdán, Javier Portu, Yerko Moreno-Simunovic, Ana M Martínez-Gil
Wine quality greatly depends on its chemical composition. Among the most important wine chemical compounds, flavonoids are the major contributors to wine organoleptic properties while amino acids have a huge impact on fermentation development and wine volatile profile. Likewise, nitrogen applications are known to have an impact on wine composition. Therefore, the aim of this work was to study the effects of foliar nitrogen applications on wine flavonoid and amino acid composition. The experiment involved five foliar nitrogen applications at veraison time: urea (Ur), urea plus sulphur (Ur+S), arginine (Arg), and two commercial fertilizers Nutrimyr Thiols (NT) and Basfoliar Algae (BA)...
June 2017: Food Research International
https://www.readbyqxmd.com/read/28528102/cheese-milk-low-homogenization-enhanced-early-lipolysis-and-volatiles-compounds-production-in-hard-cooked-cheeses
#9
María A Vélez, Erica R Hynes, Carlos A Meinardi, Verónica I Wolf, María C Perotti
Homogenization applied to cheese milk has shown to increase lipolysis but its use is not spread as it can induce detrimental effects. The aim of this work was to assess the effect of low-pressure homogenization of the cream followed by pre-incubation of cheese milk on the composition, ripening index, lipolysis and volatile profiles of hard cooked cheeses. For that, control and experimental miniature Reggianito cheeses were made and analyzed during ripening (3, 45 and 90days). Homogenization had no impact on composition and proteolysis...
June 2017: Food Research International
https://www.readbyqxmd.com/read/28528094/encapsulated-thyme-thymus-vulgaris-essential-oil-used-as-a-natural-preservative-in-bakery-product
#10
Nathalia Dias Gonçalves, Fabíola de Lima Pena, Adilson Sartoratto, Camila Derlamelina, Marta Cristina Teixeira Duarte, Adriane Elisabete Costa Antunes, Ana Silvia Prata
The objective of this work was to design a particle using thyme (Thymus vulgaris) essential oil through complex coacervation. In vitro activity against bacteria and molds of free oil as well as the encapsulated oil was verified and then in situ assay was done. The free thyme oil presented high in vitro activity, with values below 0.50mg/mL for almost all the microorganisms tested. Also, MIC values for the encapsulated oil was lower than for the free oil, probably due to the protective micro-environment promoted by the particle wall...
June 2017: Food Research International
https://www.readbyqxmd.com/read/28528090/key-odor-and-physicochemical-characteristics-of-raw-and-roasted-jicaro-seeds-crescentia-alata-k-h-b
#11
Carla Vaneza Corrales, Marc Lebrun, Fabrice Vaillant, Marie Noelle Madec, Sylvie Lortal, Ana Mercedes Pérez, Geneviève Fliedel
Jicaro seeds (Crescentia alata) are widely consumed in Central America, primarily as a popular tasty and nutritious beverage called "horchata". Seeds are roasted to develop a specific aroma through a process that has never been explored. Volatile compounds, extracted from raw and roasted jicaro seeds (140°C for 140s) by SAFE (Solvent Assisted Flavor Evaporation), were analyzed by Gas Chromatography/Mass Spectrometry (GC/MS). Twenty-seven volatile compounds were isolated, among which, ethyl-2-methylbutyrate was designated by olfactometry as providing the characteristic jicaro note (0...
June 2017: Food Research International
https://www.readbyqxmd.com/read/28527802/abrupt-weaning-reduces-postweaning-growth-and-is-associated-with-alterations-in-gastrointestinal-markers-of-development-in-dairy-calves-fed-an-elevated-plane-of-nutrition-during-the-preweaning-period
#12
M A Steele, J H Doelman, L N Leal, F Soberon, M Carson, J A Metcalf
The benefits of feeding elevated quantities of milk to dairy calves have been well established. However, there is a reluctance to adopt this method of feeding in commercial dairy production because of concerns around growth, health, and ruminal development during weaning. The objective of this study was to characterize the effect of an abrupt (0 d step-down) or gradual (12 d step-down) feeding scheme when calves are fed an elevated plane of nutrition (offered 1.35 kg of milk replacer/d). For this experiment, a total of 54 calves were randomly assigned to an abrupt or a gradual weaning protocol before weaning at 48 d of life...
May 17, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28527366/effect-of-low-protein-diets-in-heavy-pigs-on-dry-cured-ham-quality-characteristics
#13
Silvia Grassi, Ernestina Casiraghi, Simona Benedetti, Cristina Alamprese
The present work aimed at evaluating if heavy pig low-protein diets balanced for amino acid (AA) profile affect the quality characteristics of dry cured hams. To the aim, 40 hams obtained by Italian Duroc×Italian Large White pigs fed three different dietary crude protein and indispensable AA levels were compared with those obtained by a conventional Parma ham Protected Designation of Origin diet (C). No physico-chemical (aw, pH), chemical (gross composition, NaCl, lipid peroxidation, non-protein nitrogen, total volatile bases) or sensory characteristics of hams were systematically affected by the administered diet, animal sex or their interaction with the exception of total and subcutaneous fat (the latter measured by an image analysis procedure)...
May 13, 2017: Meat Science
https://www.readbyqxmd.com/read/28526637/identification-and-biological-activity-of-the-volatile-compounds-of-glycyrrhiza-triphylla-fisch-c-a-mey
#14
Abolfazl Shakeri, Javad Akhtari, Vahid Soheili, Seyedeh Faezeh Taghizadeh, Amirhossein Sahebkar, Rezvan Shaddel, Javad Asili
Chemical composition and biological (antimicrobial, antioxidant and cytotoxic) activities of essential oils (EO) obtained from the aerial parts of Glycyrrhiza triphylla Fisch. & C.A.Mey (G. triphylla) were evaluated in the present study. The EO was isolated and analyzed using gas chromatography-mass spectrometry (GC-MS). Fifty-five compounds representing 99.3% of the total oil composition were identified. Major components of the oil were β-caryophyllene (25.4%), limonene (16.7%), β-myrcene (16.0%) and α-humulene (4...
May 16, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28526346/release-study-and-inhibitory-activity-of-thyme-essential-oil-loaded-chitosan-nanoparticles-and-nanocapsules-against-foodborne-bacteria
#15
M Sotelo-Boyás, Z Correa-Pacheco, S Bautista-Baños, Y Gómez Y Gómez
The antibacterial property of thyme essential oil due to different volatile compounds, has been well documented in the literature. To overcome the high volatility of essential oil components, encapsulation has emerged as a new alternative. In this work, chitosan and thyme essential oil-loaded chitosan nanoparticles (TEO-CSNPs) and nanocapsules (TEO-CSNCs) were prepared by nanoprecipitation and nanoencapsulation, respectively. The morphology, encapsulation efficiency, release kinetics, and inhibitory activity were evaluated...
May 16, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28525868/biotransformation-of-natural-gas-and-oil-compounds-associated-with-marine-oil-discharges
#16
Odd Gunnar Brakstad, Inger K Almås, Daniel Franklin Krause
Field data from the Deepwater Horizon (DWH) oil spill in the Gulf of Mexico (GoM) suggested that oxidation of gas compounds stimulated biodegradation of oil compounds in the deep sea plume. We performed experiments with local seawater from a Norwegian fjord to examine if the presence of dissolved gas compounds (methane, ethane and propane) affected biodegradation of volatile oil compounds, and if oil compounds likewise affected gas compound oxidation. The results from the experiment showed comparable oil compound biotransformation rates in seawater at 5 °C between seawater with and without soluble gases...
May 11, 2017: Chemosphere
https://www.readbyqxmd.com/read/28525787/metals-in-the-scheldt-estuary-from-environmental-concentrations-to-bioaccumulation
#17
Evy Van Ael, Ronny Blust, Lieven Bervoets
To investigate the relationship between metal concentrations in abiotic compartments and in aquatic species, sediment, suspended matter and several aquatic species (Polychaeta, Oligochaeta, four crustacean species, three mollusc species and eight fish species) were collected during three seasons at six locations along the Scheldt estuary (the Netherlands-Belgium) and analysed on their metal content (Ag, Cd, Co, Cr, Cu, Ni, Pb, Zn and the metalloid As). Sediment and biota tissue concentrations were significantly influenced by sampling location, but not by season...
May 16, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28525576/profiling-of-volatile-organic-compounds-produced-by-clinical-aspergillus-isolates-using-gas-chromatography-mass-spectrometry
#18
M G Gerritsen, P Brinkman, N Escobar, L D Bos, K de Heer, M Meijer, H-G Janssen, H de Cock, H A B Wösten, C E Visser, M H J van Oers, P J Sterk
Volatile organic compounds (VOCs) in exhaled breath may identify the presence of invasive pulmonary aspergillosis. We aimed to detect VOC profiles emitted by in vitro cultured, clinical Aspergillus isolates using gas chromatography-mass spectrometry (GC-MS). Three clinical Aspergillus isolates and a reference strain were cultured while conidiation was prevented. Headspace samples were analyzed using a standardized method. Breath samples of patients from which the cultures were obtained were checked for the presence of the VOCs found in vitro...
May 18, 2017: Medical Mycology: Official Publication of the International Society for Human and Animal Mycology
https://www.readbyqxmd.com/read/28524743/nanoparticle-exposures-from-nano-enabled-toner-based-printing-equipment-and-human-health-state-of-science-and-future-research-needs
#19
Sandra Vanessa Pirela, John Martin, Dhimiter Bello, Philip Demokritou
Toner formulations used by laser printers (LP) and photocopiers (PC), collectively called "toner-based printing equipment" (TPE), are nano-enabled products (NEP) because they contain several engineered nanomaterials (ENM) that improve toner performance. It has been shown that during consumer use (printing), these ENM are released in the air, together with other semi-volatile organic nanoparticles, and newly formed gaseous co-pollutants such as volatile organic compounds (VOC). The aim of this review is to detail and analyze physico-chemical and morphological (PCM), as well as the toxicological properties of particulate matter (PM) emissions from TPE...
May 19, 2017: Critical Reviews in Toxicology
https://www.readbyqxmd.com/read/28523475/insurance-transitions-and-changes-in-physician-and-emergency-department-utilization-an-observational-study
#20
Michael L Barnett, Zirui Song, Sherri Rose, Asaf Bitton, Michael E Chernew, Bruce E Landon
BACKGROUND: Shopping for health insurance is encouraged as a way to find the most affordable coverage that best meets an enrollee's needs. However, the extent to which individuals switch insurance and subsequent changes in health care utilization that might arise, particularly new physician visits, are not well understood. OBJECTIVE: To examine the relationship between insurance switching and new physician and emergency department visits around the time of a switch...
May 18, 2017: Journal of General Internal Medicine
keyword
keyword
11806
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"